Can vitamin D make old muscles stronger?
A randomized study on the effect of vitamin D₃ supplementation on skeletal muscle morphology and vitamin D receptor concentration in older women.
Not medical advice. For informational purposes only. Always consult a healthcare professional. Terms
Surprising Findings
The rise in muscle vitamin D receptors was strongly correlated with rising blood vitamin D levels — even in the placebo group.
It’s counterintuitive that placebo participants showed the same biological link — suggesting the body responds to vitamin D levels regardless of supplementation source, which implies a direct physiological mechanism.
Practical Takeaways
Older adults with low vitamin D (tested via blood work) may benefit from 4000 IU/day for 4 months to support muscle fiber health.
Not medical advice. For informational purposes only. Always consult a healthcare professional. Terms
Surprising Findings
The rise in muscle vitamin D receptors was strongly correlated with rising blood vitamin D levels — even in the placebo group.
It’s counterintuitive that placebo participants showed the same biological link — suggesting the body responds to vitamin D levels regardless of supplementation source, which implies a direct physiological mechanism.
Practical Takeaways
Older adults with low vitamin D (tested via blood work) may benefit from 4000 IU/day for 4 months to support muscle fiber health.
Publication
Journal
The Journal of clinical endocrinology and metabolism
Year
2013
Authors
L. Ceglia, Sathit Niramitmahapanya, Mauricio da Silva Morais, D. Rivas, S. Harris, H. Bischoff-Ferrari, R. Fielding, B. Dawson-Hughes
Related Content
Claims (5)
Having more vitamin D in your body might help you build more muscle and store less fat, directing your body’s energy toward making lean tissue instead.
For older women who have trouble moving and don’t have enough vitamin D, taking a daily vitamin D pill for four months can boost a key protein inside their muscle cells by about 30%, which might mean vitamin D directly helps muscle cells communicate better.
For older women who have trouble moving around and don’t have enough vitamin D, taking a daily vitamin D pill for four months might make their muscle fibers about 10% bigger than if they took a sugar pill — which could mean it helps build muscle.
When older women who have trouble moving around get more vitamin D in their blood, their muscle cells seem to respond by making more vitamin D receptors — and this happens no matter how they got the vitamin D, like from pills or sun exposure.
Taking a daily vitamin D3 pill (4000 IU) for four months can help older adults with low vitamin D levels build stronger muscle fibers by increasing the number of vitamin D receptors inside their muscle cells.